Coulter blade



FIG. 1 is a perspective view of an coulter blade showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a right side elevational view thereof.

The broken lines in the drawings illustrate portions of the coulter blade and form no part of the claimed design. 

CLAIM The ornamental design for a coulter blade, as shown and described. 